Portable Electronic Device with Maintenance Capability

1. A portable electronic device, comprising: a circuit board; at least one treatment element mounted adjacent to the circuit board and storing volatile treatment liquids therein; and a shield defining a plurality of meshes therein, the shield shielding a part of the circuit board to prevent the part of the circuit board from being dampened by the treatment liquids; wherein the circuit board generates heat to heat the treatment element when the portable electronic device is working, and then the treatment liquids volatilize and enter the shield through the meshes to maintain the part of the circuit board shielded by the shield.

2. The portable electronic device as claimed in claim 1 , wherein the treatment liquid is selected from the group consisting of antioxidants, cleansers and perfumes.

3. The portable electronic device as claimed in claim 1 , further comprising a cover assembled to the circuit board, and the treatment element is mounted on the cover.

4. The portable electronic device as claimed in claim 3 , wherein the treatment element is made of absorptive material, and the volatile treatment liquid is absorbed in the treatment element.

5. The portable electronic device as claimed in claim 4 , wherein the treatment element is made of any one selected from the group consisting of foam, sponge and active carbon.

6. The portable electronic device as claimed in claim 4 , wherein the cover defines at least one injecting hole communicating to the treatment element for supplying volatile treatment liquid to the treatment element.

7. The portable electronic device as claimed in claim 3 , wherein the treatment element is a changeable solid substance made of solid maintaining matter or storing solid/liquid maintaining matter therein.

8. The portable electronic device as claimed in claim 1 , wherein the shield is made of transcalent material.

9. A portable electronic device, comprising: a circuit board; a cover assembled to the circuit board; at least one treatment element attached to the cover and placed between the circuit board and the cover, wherein the treatment element comprises volatilize maintaining matter, and the maintaining matter automatically volatilizes to maintain the portable electronic device; and a shield defining a plurality of meshes therein and shielding a part of the circuit board; wherein when the maintaining matter has not volatilized, the shield separates the part of the circuit board from the maintaining matter; and when the maintaining matter has volatilized, the gaseous maintaining matter enters the shield through the meshes to maintain the part of the circuit board shielded by the shield.

10. The portable electronic device as claimed in claim 9 , wherein the maintaining matter volatilizes when the circuit board generates heat in working process to heat the treatment element.

11. The portable electronic device as claimed in claim 9 , wherein the maintaining matter is selected from the group consisting of antioxidants, cleansers and perfumes.

12. The portable electronic device as claimed in claim 9 , wherein the treatment element is made of absorptive material, and the maintaining material is liquid material absorbed in the treatment element.

13. The portable electronic device as claimed in claim 12 , wherein the treatment element is made of any one selected in the group consisting of foam, sponge and active carbon.

14. The portable electronic device as claimed in claim 9 , wherein the cover defines at least one injecting hole communicating with the treatment element for supplying liquid maintaining matters to the treatment element.

15. The portable electronic device as claimed in claim 9 , wherein the treatment element is a changeable solid substance made of solid maintaining matter or storing solid/liquid maintaining matter therein.

16. The portable electronic device as claimed in claim 9 , wherein the shield is placed between the circuit board and the cover and aligned with the treatment element.

17. The portable electronic device as claimed in claim 16 , wherein the shield is made of transcalent material.

18. The portable electronic device as claimed in claim 1 , wherein the treatment liquids further maintain parts of the portable electronic device that are positioned out of the shield when volatizing.

19. The portable electronic device as claimed in claim 9 , wherein the maintaining matter further maintains parts of the portable electronic device that are positioned out of the shield when volatizing.